706528013221 has 2 divisors, whose sum is σ = 706528013222. Its totient is φ = 706528013220.

The previous prime is 706528013203. The next prime is 706528013263. The reversal of 706528013221 is 122310825607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684526224321 + 22001788900 = 827361^2 + 148330^2 .

It is a cyclic number.

It is not a de Polignac number, because 706528013221 - 2²⁹ = 705991142309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (706528013201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353264006610 + 353264006611.

It is an arithmetic number, because the mean of its divisors is an integer number (353264006611).

Almost surely, 2^706528013221 is an apocalyptic number.

It is an amenable number.

706528013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

706528013221 is an equidigital number, since it uses as much as digits as its factorization.

706528013221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

Adding to 706528013221 its reverse (122310825607), we get a palindrome (828838838828).

The spelling of 706528013221 in words is "seven hundred six billion, five hundred twenty-eight million, thirteen thousand, two hundred twenty-one".